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MOT History from tests of petrol TRIUMPH STAGs year 1978

Review the list of common TRIUMPH STAG failures below or to perform a specific mot history check on your TRIUMPH then use our popular KnowYourCar service

mot history
Pass percent:68.51%
(The average a petrol TRIUMPH STAG year 1978 passes without issue)
Based on:3,512 MOT Tests
Most common failuresNo# failures
Exhaust emissions carbon monoxide content excessive |7.3.B.1a|228
Headlamp aim out of alignment171
Parking brake: efficiency below requirements |3.7.B.7|111
Windscreen wiper does not clear the windscreen effectively96
Rear brake binding91
Brakes imbalanced across an axle66
Registration plate lamp issues65
Nearside Stop lamp not working |1.2.1b|54
Rear parking brake recording little or no effort54
Offside Stop lamp not working |1.2.1b|52
Nearside Rear Direction indicator not working |1.4.A.2c|43
Horn not working |1.6.2a|40
Brake pipe excessively corroded39
Exhaust emissions hydrocarbon content excessive |7.3.B.1b|36
Nearside Headlamp not working on dipped beam |1.7.5a|33
Rear brake application uneven29
Offside Rear Direction indicator not working |1.4.A.2c|29
Service brake: efficiency below requirements |3.7.B.7|25
Registration plate issues22
Nearside Steering rack gaiter split |2.2.D.2d|21
Offside Steering rack gaiter split |2.2.D.2d|21
Offside Headlamp not working on dipped beam |1.7.5a|20
Nearside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3|20
Battery insecure |1.9.1|20
Exhaust emissions carbon monoxide content excessive (8.2.1.2 (b))18
Parking brake lever has no reserve travel |3.1.6b|18
Nearside Headlamp not working on main beam |1.7.5a|18
Nearside Front position lamp|s| not working |1.1.A.3b|16
Hazard warning lamps inoperative |1.4.B.1b|16
Offside Rear wheel bearing has excessive play |2.6.2|15
Steering column top bearing excessively worn |2.1.2c|15
Offside Headlamp not working on main beam |1.7.5a|15
Windscreen washer not working 15
Nearside Rear Stop lamp not working |1.2.1b|15
Nearside Rear Subframe mounting prescribed area is excessively corroded |2.4.A.3|14
Offside front brake binding |3.7.B.1|14
Offside Rear position lamp|s| adversely affected by the operation of another lamp |1.1.A.3f|13
Nearside Rear position lamp|s| not working |1.1.A.3b|13
Offside Front wheel bearing has excessive play |2.5.A.3c|13
Offside Front position lamp|s| not working |1.1.A.3b|13
Offside Rear Stop lamp not working |1.2.1b|13
Front brake application uneven13
Offside rear brake recording little or no effort |3.7.B.5a|13
Nearside Front Headlamp not working on dipped beam |1.7.5a|12
Direction indicators flashing less than 60 times a minute |1.4.A.2g|12
Nearside Rear Direction indicators not working |1.4.A.2c|12
Nearside Front Lower Suspension arm ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.4.G.2|12
Nearside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3|12
Rear Exhaust system not adequately supported |7.1.1|12
Nearside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d|12
Offside Rear Direction indicators not working |1.4.A.2c|12
Nearside Track rod end ball joint has excessive play |2.2.B.1f|11
Offside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3|11
Offside Steering rack gaiter insecure |2.2.D.2d|11
Offside Front Steering rack gaiter split |2.2.D.2d|11
Exhaust emissions carbon monoxide content excessive |8.2.1.2 |b||11
Offside Rear position lamp|s| not working |1.1.A.3b|11
Rear Mechanical brake component has restricted free movement10
Offside Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a|10
Nearside Front wheel bearing has excessive play |2.5.A.3c|10
Offside Front Lower Suspension arm ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.4.G.2|10
Offside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3|10
Hazard warning switch faulty |1.4.B.1d|10
Offside Rear Subframe mounting prescribed area is excessively corroded |2.4.A.3|10
Nearside Steering rack gaiter insecure |2.2.D.2d|9
Offside Stop lamp adversely affected by the operation of another lamp |1.2.1f|9
Nearside Front Headlamp not working on main beam |1.7.5a|9
Offside Front Track rod end ball joint has excessive play |2.2.B.1f|9
Nearside Front Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|9
Fuel cap/sealing device sealing washer missing |7.2.4c|9
Offside Front Lower Suspension arm ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.4.G.2|9
Nearside Front Subframe mounting prescribed area is excessively corroded |2.4.A.3|9
Hazard warning lamps not flashing in phase, with ignition on |1.4.B.1f|9
Nearside Front Front wheel bearing has excessive play |2.5.A.3c|9
Offside Track rod end ball joint has excessive play |2.2.B.1f|9
Offside Side repeater not working |1.4.A.2c|8
Nearside Front Direction indicator not working |1.4.A.2c|8
Power steering component|s| leaking |2.3.3b|8
Nearside Rear rear brake recording little or no effort |3.7.B.5a|8
Parking brake efficiency below requirements (1.4.2 (a) (i))8
Nearside Front Track rod end ball joint has excessive play |2.2.B.1f|8
Nearside rear brake recording little or no effort |3.7.B.5a|8
Hazard warning lamps not flashing in phase, with ignition off |1.4.B.1f|8
Nearside Front Suspension arm ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.4.G.2|8
Nearside Front Front position lamp|s| not working |1.1.A.3b|7
Nearside front brake binding |3.7.B.1|7
Nearside Rear Rear wheel bearing has excessive play |2.6.2|7
Offside Front Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|7
Steering column top mounting bracket insecure |2.1.2d|7
Nearside Side repeater not working |1.4.A.2c|7
Nearside Front Lower Suspension arm ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.4.G.2|7
Offside Front Direction indicator not working |1.4.A.2c|7
Offside Front Seat belt locking mechanism does not secure or release |5.2.5a|7
Offside Front Track rod end ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.2.C.1c|7
Front Windscreen wiper not operating automatically when switched on |8.2.1b|7
Offside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d|7
Offside Front Suspension arm ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.4.G.2|7
Offside Front Headlamp not working on dipped beam |1.7.5a|6
Nearside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|6
Offside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|6
Offside Rear rear brake recording little or no effort |3.7.B.5a|6
Offside Front Suspension arm ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.4.G.2|6
Nearside Rear Suspension spring mounting prescribed area is excessively corroded |2.4.A.3|6
Nearside Front Suspension arm has excessive play in a ball joint |2.4.G.2|6
Nearside Track rod end ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.2.C.1c|6
Nearside Rear wheel bearing has excessive play |2.6.2|6
Brake hose excessively deteriorated6
Nearside Rear position lamp|s| adversely affected by the operation of another lamp |1.1.A.3f|6
Nearside Front Lower Suspension arm has excessive play in a ball joint |2.4.G.2|6
Offside Seat belt anchorage prescribed area is excessively corroded |5.2.6|6
Nearside Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a|5
Horn not working (7.7 (a) (ii))5
Stop lamp not working |1.2.1b|5
Offside Rear Rear wheel bearing has excessive play |2.6.2|5
Direction indicators not working |1.4.A.2c|5
Nearside Seat belt anchorage prescribed area is excessively corroded |5.2.6|5
Nearside Front Track rod end ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.2.C.1c|5
Offside Front Headlamp not working on main beam |1.7.5a|5
Fuel pipe leaking |7.2.3|5
Offside Headlamp aim beam image obviously incorrect |1.8.A.1b|5
Fuel cap/sealing device sealing washer torn |7.2.4c|5
Offside Rear Rear position lamp|s| not working |1.1.A.3b|5
Nearside Front Track rod end ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.2.C.1c|5
Mechanical brake component has restricted free movement5
Nearside Stop lamp adversely affected by the operation of another lamp |1.2.1f|5
Parking brake: efficiency below requirements |3.7.C.1b|5
Fuel system component leaking |7.2.3|5
Brake pipe inadequately clipped |3.6.B.1|5
Nearside Front Suspension arm ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.4.G.2|5
Offside Front Front wheel bearing has excessive play |2.5.A.3c|5
Nearside Front Brake pipe inadequately clipped |3.6.B.1|4
Offside Rear Direction indicator not working |4.4.1 |a| |ii||4
Nearside Front Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i))4
Offside Headlamp aim beam image kick up to the offside |1.8|4
Offside Rear Stop lamp adversely affected by the operation of another lamp |1.2.1f|4
Offside Rear Seat belt retracting mechanism defective |5.2.5b|4
Offside Steering arm has relative movement at its fixings |2.2.B.1h|4
Offside Rear Suspension spring mounting prescribed area is excessively corroded |2.4.A.3|4
Offside Direction indicator flashing less than 60 times a minute |1.4.A.2g|4
Nearside Stop lamp(s) not working (4.3.1 (a) (ii))4
Driver`s seat insecure |6.2.A.1|4
Fuel hose leaking |7.2.3|4
Offside Front front brake binding |3.7.B.1|4
Nearside Front Side repeater not working |1.4.A.2c|4
Nearside Rear Shock absorber has a serious fluid leak |2.7.3|4
Nearside Rear Rear position lamp|s| adversely affected by the operation of another lamp |1.1.A.3f|4
Offside Front Steering arm has relative movement at its fixings |2.2.B.1h|4
Offside Front Seat belt damaged sufficient to obstruct correct operation of the belt |5.2.2a|4
Nearside Front Steering rack gaiter split |2.2.D.2d|4
Offside Rear Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|4
Nearside Rear Exhaust emissions carbon monoxide content excessive |7.3.B.1a|4
Nearside Front Seat belt locking mechanism does not secure or release |5.2.5a|4
Offside Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2|4
Nearside Rear Seat belt retracting mechanism defective |5.2.5b|4
Offside Stop lamp excessively damaged so that it is not visible from a reasonable distance |1.2.1d|4
Nearside Headlamp not in good working order adversely affecting beam image |1.2.4a|4
Exhaust has a major leak of exhaust gases |7.1.2|4
Nearside rear brake excessively fluctuating |3.7.B.3|4
Offside Ball joint has excessive play |2.2.B.1f|4
Offside Rear Service brake excessively binding (1.2.1 (f))4
Offside Rear Seat belt anchorage prescribed area is excessively corroded |5.2.6|4
Parking brake efficiency below requirements |1.4.2 |a| |i||4
Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b|4
Offside Track rod end ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.2.C.1c|4

We get to these numbers by trawling through over 1 billion MOT test results since 2004 and crunched the numbers. We remove anything to do with Tyres, as they are model independent and group together common non-model specific issues. We are trying to get to a picture of what models have what issues.

Please note: We take the data from the DVSA. This data is raw and can contain typos and spelling mistakes that garages may have entered while recording a MOT result. Specifically miss-match on names of models and makes. We are constantly cleaning the data so bear with the odd issue.

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